Public Stream is delivering Faster than User Stream why?


Public Stream especially with a Tracking Keyword delivers tweets faster than User Streams. I mean it delivers it really in real time compared to User Stream. I tried tweeting in the timeline of user currently in the user stream and I’m expecting it will be delivered live stream. I’m using the QTweetLib for BlackBerry 10

This is my Streaming URL setting

Does anybody know? Thanks in advanced.